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Fastener installation tool

Active Publication Date: 2012-04-10
AVDEL UK LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0008]The present invention provides a fastener installation tool wherein the tool is disabled when the collector bottle is unattached. As the tool cannot be used when the collector bottle is not attached, the risk of injury or

Problems solved by technology

The safety shutter when actuated provides a fixed barrier normal to the path of the stems, and prevents stems from being ejected from the tool without the collection means being in place, which could cause injury to the operator.
However, a problem with the use of such a safety shutter is that the stems may jam in the installatio

Method used

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Examples

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Example

[0027]In the first embodiment, as illustrated in FIGS. 1 to 6, the disabling means is arranged to actuate in response to a loss of pressure signal. In the alternative embodiment of FIGS. 7 to 10, the disabling means is caused to actuate to prevent operation of the tool when a signal is received. The same numerals have been used as for the first embodiment where appropriate.

[0028]As illustrated in FIGS. 7 and 9, the tool 2 of this embodiment includes a sleeve 28 positioned between the adaptor 30 and the collector bottle 4. The sleeve 28 seals the aperture 18 through which compressed air would otherwise be vented. Between the tool 2 and sleeve 28 is a cavity 26.

[0029]When the collector bottle 4 is connected to the tool 2, a further, venting valve 24 is maintained in a closed state. When the venting valve 24 is closed, the positive pressure in the cavity 26 is allowed to vent to the atmosphere. In this state, a pressure signal is not sent to the disabling valve 14, and therefore the di...

Example

[0031]A third embodiment of the present invention is illustrated in FIGS. 11 and 12. The same numerals have been used as for the first embodiment where appropriate.

[0032]In the third embodiment, the disabling valve 14 is not present. The disabling means includes a chamber 32, which is provided in place of the valve 14 of the previous embodiments, and an internal valve 34, provided in the cavity 26, at the entrance to channel 16.

[0033]When the collector bottle 4 is connected to the tool 2, the venting valve 24 is maintained in a closed state. When the venting valve 24 is closed, the positive pressure in the cavity 26 is allowed to vent to the atmosphere. The internal valve 34 is maintained in a closed state, thereby preventing air escaping from the channel 16. In this state, no air is supplied to the chamber 32 via the channel 16. Air is fed to the chamber only by means of the main operating valve 12, and is prevented from escaping through cavity 26 by the internal valve 34. Thus air...

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Abstract

A fastener installation tool for installing breakstem fasteners, wherein a part of the fastener is broken off during installation and ejected into a collector bottle, provided with a safety disabling means, comprising a valve located in series with and between the tool trigger and main operating valve, wherein removal of the collector bottle causes the valve to close to prevent operation of the main operating valve, thereby to prevent use of the tool with the connector bottle disconnected.

Description

[0001]This application is a National Phase filing regarding International Application No. PCT / GB2008 / 050981, filed Oct. 23, 2008. International Application No. PCT / GB2008 / 050981 relies upon British Application No. 0724657.2, filed Dec. 19, 2007 for priority.BACKGROUND AND SUMMARY[0002]This invention relates to a safety device for a fastener installation tool provided with collection means for collecting parts of fasteners which are broken off during installation of the fastener.[0003]Fastener installation tools including collection means are known, for example as described in GB 2372475B. The tools may be provided with a vacuum extraction facility whereby broken-off parts, i.e. stems, are ejected into the collection means during normal operation of the tool. The collection means may be removable to allow the tool operator to empty the broken-off parts, i.e. stems, from the collection means. Installation tools having removable collection means may include a safety shutter, which is a...

Claims

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Application Information

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IPC IPC(8): B21J15/22B21D9/05
CPCB21J15/043B21J15/105B21J15/22B21J15/326Y10T29/5373Y10T29/53748Y10T29/53739B21J15/18
Inventor DEAR, AIDENSEEWRAJ, ANGRAJ KUMARANDREW, SIMON
Owner AVDEL UK LTD
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